Hello,
Yes, you will need to uninstall the game on your first PC and then install it on the second PC. Old activation key will not be valid anymore, so you will need to obtain a new one. You can do it by following instruction in your purchase confirmation email as you’ve done it at the first time.
Instruction how to install and activate the game (you should do it after you’ve uninstalled the game on the first PC):
1. Follow this link -
www.files.citycardriving.com/CityCarDriving_En.exe to download the game.
2. Run the downloaded installation file with administrator privileges (right click on it and choose "Run as administrator in the context menu) and follow instructions of the setup wizard. During the installation process you should agree on installing all additional software, because it's necessary for correct program operation.
Now you should obtain the program activation key:
3. After installation of the program is finished, run the installed game with administrator privileges (right click on the game's shortcut and choose "Run as administrator in the context menu).
4. Copy the product code from the game startup window.
5. Follow this link -
www.activate.citycardriving.com/
6. On the web page you've just opened you should enter: your serial number, the product code you have just copied, and your e-mail.
The activation key will be displayed on the final page, after you'll click the "Activate" button.
7. Enter your activation key into the box in the game startup window and click "Registration" button.